my '70 skylark custom has this hesitation that occurs, just when you start to get on the gas, and i have looked in the car's documents, and found out that the car has been doing this since 1987! ( i just recently bought the car) The previous owner says that he rebuilt the carb, thinking that the problem was in the carb. It continues to happen, so i am considering going with a new carb, probably a 4-bbl. i would really rather just fix the hesitation, rather than go through the large expense of buying a new carb for it; if this is a common problem, or anybody knows what the problem is, i would be grateful for a reply! Any help would be appreciated!